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a August 6, 2010 6056.8 Boreholes is sealed <br />0 <br />The data suggests that changes to B seam water level have occurred likely not only from mine <br />water transfers but natural sources as well. See also the discussion regarding the H-10 well <br />where that monitor well indicates a variable water level in the old Somerset Mine B seam <br />workings. <br />Initially, once a year, samples of water were taken of water transferred to D213 and D2132 and <br />summarized below. The access to the pumps leading to D2132 is permanently sealed with the <br />sealing of the West District. No issues have been encountered with respect to the analytical <br />results. <br /> D2B D2B2 <br />Date H TSS H TSS <br />November 18, 2010 9.11 23 mg/1 N/A N/A <br />October 15, 2009 8.44 17 mg/1 Not available Not available <br />December 31, 2008 8.69 38 mg/1 Not available Not available <br />December 31, 2007 8.72 17 mg/1 8.49 14 mg/1 <br />June 13, 2006 8.58 12 mg/1 8.15 39 mg/1 <br />June 6, 2005 8.57 10 mg/1 NA NA <br />December 28, 2004 8.53 6 mg/1 NA NA <br />SC-1 Well -Rollins Sandstone <br />Monitor well SC-1 is located just east of the reclaimed Sanborn Creek mine portal area. <br />Well SC-1 was completed in the Rollins Sandstone, which is located 40 to 50 feet below the 13- <br />Seam. Monitoring data were historically collected from well SC-1 prior to any substantial <br />mining in the B-Seam of the Sanborn Creek Mine. The SC-1 well is located up-gradient relative <br />to the Rollins Sandstone unit which is located stratigraphically under the footprint of the mining <br />activities. <br />Water in the Rollins Sandstone is confined to limited localized zones that are fractured and/or <br />contained above the Rollins, as evidenced by water level measurements that are well above the <br />top of the sandstone member. Water quality is poor, with high total dissolved solids as sodium <br />chloride. Inflow and recovery of the water level in the drill holes indicates very low <br />permeability and porosity of the sandstone. There has been some variability in the water levels <br />measured in well SC-1 but there has been no apparent trend or indication of impact. No <br />significant difference in the 2010 monitoring results from baseline or historical measurements <br />was noted in well SC-1. <br />The limited water quantity and poor water quality suggests there is limited transmissivity <br />between the North Fork of the Gunnison River alluvium through the Rollins sandstone down- <br />gradient towards the area associated with the Sanborn Creek Mine. <br />SC-3 Well - B-Seam Coal - Sanborn Creek Mine <br />15